1 |
#define _XOPEN_SOURCE 500 |
2 |
|
3 |
#include "EXTERN.h" |
4 |
#include "perl.h" |
5 |
#include "XSUB.h" |
6 |
|
7 |
#include <sys/types.h> |
8 |
#include <sys/stat.h> |
9 |
|
10 |
#include <unistd.h> |
11 |
#include <fcntl.h> |
12 |
#include <signal.h> |
13 |
#include <sched.h> |
14 |
#if __linux |
15 |
#include <sys/syscall.h> |
16 |
#endif |
17 |
|
18 |
#include <pthread.h> |
19 |
|
20 |
typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
21 |
typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
22 |
typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
23 |
|
24 |
#if __ia64 |
25 |
# define STACKSIZE 65536 |
26 |
#else |
27 |
# define STACKSIZE 4096 |
28 |
#endif |
29 |
|
30 |
enum { |
31 |
REQ_QUIT, |
32 |
REQ_OPEN, REQ_CLOSE, |
33 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
34 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, |
35 |
REQ_FSYNC, REQ_FDATASYNC, |
36 |
}; |
37 |
|
38 |
typedef struct aio_cb { |
39 |
struct aio_cb *volatile next; |
40 |
|
41 |
int type; |
42 |
|
43 |
int fd; |
44 |
off_t offset; |
45 |
size_t length; |
46 |
ssize_t result; |
47 |
mode_t mode; /* open */ |
48 |
int errorno; |
49 |
SV *data, *callback; |
50 |
void *dataptr; |
51 |
STRLEN dataoffset; |
52 |
|
53 |
Stat_t *statdata; |
54 |
} aio_cb; |
55 |
|
56 |
typedef aio_cb *aio_req; |
57 |
|
58 |
static int started; |
59 |
static volatile int nreqs; |
60 |
static int max_outstanding = 1<<30; |
61 |
static int respipe [2]; |
62 |
|
63 |
static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; |
64 |
static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; |
65 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
66 |
|
67 |
static volatile aio_req reqs, reqe; /* queue start, queue end */ |
68 |
static volatile aio_req ress, rese; /* queue start, queue end */ |
69 |
|
70 |
static void |
71 |
poll_wait () |
72 |
{ |
73 |
if (nreqs && !ress) |
74 |
{ |
75 |
fd_set rfd; |
76 |
FD_ZERO(&rfd); |
77 |
FD_SET(respipe [0], &rfd); |
78 |
|
79 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
80 |
} |
81 |
} |
82 |
|
83 |
static int |
84 |
poll_cb () |
85 |
{ |
86 |
dSP; |
87 |
int count = 0; |
88 |
aio_req req, prv; |
89 |
|
90 |
static int rl;//D |
91 |
//printf ("%d ENTER\n", ++rl);//D |
92 |
|
93 |
pthread_mutex_lock (&reslock); |
94 |
|
95 |
{ |
96 |
/* read any signals sent by the worker threads */ |
97 |
char buf [32]; |
98 |
while (read (respipe [0], buf, 32) > 0) |
99 |
; |
100 |
} |
101 |
|
102 |
req = ress; |
103 |
ress = rese = 0; |
104 |
|
105 |
pthread_mutex_unlock (&reslock); |
106 |
|
107 |
while (req) |
108 |
{ |
109 |
nreqs--; |
110 |
//printf ("%d count %d %p->%p\n", rl, count, req, req->next);//D |
111 |
|
112 |
if (req->type == REQ_QUIT) |
113 |
started--; |
114 |
else |
115 |
{ |
116 |
int errorno = errno; |
117 |
errno = req->errorno; |
118 |
|
119 |
if (req->type == REQ_READ) |
120 |
SvCUR_set (req->data, req->dataoffset |
121 |
+ req->result > 0 ? req->result : 0); |
122 |
|
123 |
if (req->data) |
124 |
SvREFCNT_dec (req->data); |
125 |
|
126 |
if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
127 |
{ |
128 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
129 |
PL_laststatval = req->result; |
130 |
PL_statcache = *(req->statdata); |
131 |
|
132 |
Safefree (req->statdata); |
133 |
} |
134 |
|
135 |
PUSHMARK (SP); |
136 |
XPUSHs (sv_2mortal (newSViv (req->result))); |
137 |
|
138 |
if (req->type == REQ_OPEN) |
139 |
{ |
140 |
/* convert fd to fh */ |
141 |
SV *fh; |
142 |
|
143 |
PUTBACK; |
144 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
145 |
SPAGAIN; |
146 |
|
147 |
fh = POPs; |
148 |
|
149 |
PUSHMARK (SP); |
150 |
XPUSHs (fh); |
151 |
} |
152 |
|
153 |
if (SvOK (req->callback)) |
154 |
{ |
155 |
PUTBACK; |
156 |
call_sv (req->callback, G_VOID | G_EVAL); |
157 |
SPAGAIN; |
158 |
} |
159 |
|
160 |
if (req->callback) |
161 |
SvREFCNT_dec (req->callback); |
162 |
|
163 |
errno = errorno; |
164 |
count++; |
165 |
} |
166 |
|
167 |
prv = req; |
168 |
req = req->next; |
169 |
Safefree (prv); |
170 |
|
171 |
/* TODO: croak on errors? */ |
172 |
} |
173 |
|
174 |
//printf ("%d LEAVE %p %p\n", rl--, ress, rese);//D |
175 |
return count; |
176 |
} |
177 |
|
178 |
static void *aio_proc(void *arg); |
179 |
|
180 |
static void |
181 |
start_thread (void) |
182 |
{ |
183 |
sigset_t fullsigset, oldsigset; |
184 |
pthread_t tid; |
185 |
pthread_attr_t attr; |
186 |
|
187 |
pthread_attr_init (&attr); |
188 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
189 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
190 |
|
191 |
sigfillset (&fullsigset); |
192 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
193 |
|
194 |
if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
195 |
started++; |
196 |
|
197 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
198 |
} |
199 |
|
200 |
static void |
201 |
send_req (aio_req req) |
202 |
{ |
203 |
nreqs++; |
204 |
|
205 |
pthread_mutex_lock (&reqlock); |
206 |
|
207 |
req->next = 0; |
208 |
|
209 |
if (reqe) |
210 |
{ |
211 |
reqe->next = req; |
212 |
reqe = req; |
213 |
} |
214 |
else |
215 |
reqe = reqs = req; |
216 |
|
217 |
pthread_cond_signal (&reqwait); |
218 |
pthread_mutex_unlock (&reqlock); |
219 |
|
220 |
while (nreqs > max_outstanding) |
221 |
{ |
222 |
poll_wait (); |
223 |
poll_cb (); |
224 |
} |
225 |
} |
226 |
|
227 |
static void |
228 |
end_thread (void) |
229 |
{ |
230 |
aio_req req; |
231 |
New (0, req, 1, aio_cb); |
232 |
req->type = REQ_QUIT; |
233 |
|
234 |
send_req (req); |
235 |
} |
236 |
|
237 |
static void |
238 |
read_write (int dowrite, int fd, off_t offset, size_t length, |
239 |
SV *data, STRLEN dataoffset, SV *callback) |
240 |
{ |
241 |
aio_req req; |
242 |
STRLEN svlen; |
243 |
char *svptr = SvPV (data, svlen); |
244 |
|
245 |
SvUPGRADE (data, SVt_PV); |
246 |
SvPOK_on (data); |
247 |
|
248 |
if (dataoffset < 0) |
249 |
dataoffset += svlen; |
250 |
|
251 |
if (dataoffset < 0 || dataoffset > svlen) |
252 |
croak ("data offset outside of string"); |
253 |
|
254 |
if (dowrite) |
255 |
{ |
256 |
/* write: check length and adjust. */ |
257 |
if (length < 0 || length + dataoffset > svlen) |
258 |
length = svlen - dataoffset; |
259 |
} |
260 |
else |
261 |
{ |
262 |
/* read: grow scalar as necessary */ |
263 |
svptr = SvGROW (data, length + dataoffset); |
264 |
} |
265 |
|
266 |
if (length < 0) |
267 |
croak ("length must not be negative"); |
268 |
|
269 |
Newz (0, req, 1, aio_cb); |
270 |
|
271 |
if (!req) |
272 |
croak ("out of memory during aio_req allocation"); |
273 |
|
274 |
req->type = dowrite ? REQ_WRITE : REQ_READ; |
275 |
req->fd = fd; |
276 |
req->offset = offset; |
277 |
req->length = length; |
278 |
req->data = SvREFCNT_inc (data); |
279 |
req->dataptr = (char *)svptr + dataoffset; |
280 |
req->callback = SvREFCNT_inc (callback); |
281 |
|
282 |
send_req (req); |
283 |
} |
284 |
|
285 |
static void * |
286 |
aio_proc (void *thr_arg) |
287 |
{ |
288 |
aio_req req; |
289 |
int type; |
290 |
|
291 |
do |
292 |
{ |
293 |
pthread_mutex_lock (&reqlock); |
294 |
|
295 |
for (;;) |
296 |
{ |
297 |
req = reqs; |
298 |
|
299 |
if (reqs) |
300 |
{ |
301 |
reqs = reqs->next; |
302 |
if (!reqs) reqe = 0; |
303 |
} |
304 |
|
305 |
if (req) |
306 |
break; |
307 |
|
308 |
pthread_cond_wait (&reqwait, &reqlock); |
309 |
} |
310 |
|
311 |
pthread_mutex_unlock (&reqlock); |
312 |
|
313 |
errno = 0; /* strictly unnecessary */ |
314 |
|
315 |
type = req->type; |
316 |
|
317 |
switch (type) |
318 |
{ |
319 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
320 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
321 |
#if SYS_readahead |
322 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
323 |
#else |
324 |
case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break; |
325 |
#endif |
326 |
|
327 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
328 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
329 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
330 |
|
331 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
332 |
case REQ_CLOSE: req->result = close (req->fd); break; |
333 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
334 |
|
335 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
336 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
337 |
|
338 |
case REQ_QUIT: |
339 |
break; |
340 |
|
341 |
default: |
342 |
req->result = ENOSYS; |
343 |
break; |
344 |
} |
345 |
|
346 |
req->errorno = errno; |
347 |
|
348 |
pthread_mutex_lock (&reslock); |
349 |
|
350 |
req->next = 0; |
351 |
|
352 |
if (rese) |
353 |
{ |
354 |
rese->next = req; |
355 |
rese = req; |
356 |
} |
357 |
else |
358 |
{ |
359 |
rese = ress = req; |
360 |
|
361 |
/* write a dummy byte to the pipe so fh becomes ready */ |
362 |
write (respipe [1], &respipe, 1); |
363 |
} |
364 |
|
365 |
pthread_mutex_unlock (&reslock); |
366 |
} |
367 |
while (type != REQ_QUIT); |
368 |
|
369 |
return 0; |
370 |
} |
371 |
|
372 |
MODULE = IO::AIO PACKAGE = IO::AIO |
373 |
|
374 |
PROTOTYPES: ENABLE |
375 |
|
376 |
BOOT: |
377 |
{ |
378 |
if (pipe (respipe)) |
379 |
croak ("unable to initialize result pipe"); |
380 |
|
381 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
382 |
croak ("cannot set result pipe to nonblocking mode"); |
383 |
|
384 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
385 |
croak ("cannot set result pipe to nonblocking mode"); |
386 |
} |
387 |
|
388 |
void |
389 |
min_parallel(nthreads) |
390 |
int nthreads |
391 |
PROTOTYPE: $ |
392 |
CODE: |
393 |
while (nthreads > started) |
394 |
start_thread (); |
395 |
|
396 |
void |
397 |
max_parallel(nthreads) |
398 |
int nthreads |
399 |
PROTOTYPE: $ |
400 |
CODE: |
401 |
{ |
402 |
int cur = started; |
403 |
while (cur > nthreads) |
404 |
{ |
405 |
end_thread (); |
406 |
cur--; |
407 |
} |
408 |
|
409 |
while (started > nthreads) |
410 |
{ |
411 |
poll_wait (); |
412 |
poll_cb (); |
413 |
} |
414 |
} |
415 |
|
416 |
int |
417 |
max_outstanding(nreqs) |
418 |
int nreqs |
419 |
PROTOTYPE: $ |
420 |
CODE: |
421 |
RETVAL = max_outstanding; |
422 |
max_outstanding = nreqs; |
423 |
|
424 |
void |
425 |
aio_open(pathname,flags,mode,callback=&PL_sv_undef) |
426 |
SV * pathname |
427 |
int flags |
428 |
int mode |
429 |
SV * callback |
430 |
PROTOTYPE: $$$;$ |
431 |
CODE: |
432 |
{ |
433 |
aio_req req; |
434 |
|
435 |
Newz (0, req, 1, aio_cb); |
436 |
|
437 |
if (!req) |
438 |
croak ("out of memory during aio_req allocation"); |
439 |
|
440 |
req->type = REQ_OPEN; |
441 |
req->data = newSVsv (pathname); |
442 |
req->dataptr = SvPV_nolen (req->data); |
443 |
req->fd = flags; |
444 |
req->mode = mode; |
445 |
req->callback = SvREFCNT_inc (callback); |
446 |
|
447 |
send_req (req); |
448 |
} |
449 |
|
450 |
void |
451 |
aio_close(fh,callback=&PL_sv_undef) |
452 |
InputStream fh |
453 |
SV * callback |
454 |
PROTOTYPE: $;$ |
455 |
ALIAS: |
456 |
aio_close = REQ_CLOSE |
457 |
aio_fsync = REQ_FSYNC |
458 |
aio_fdatasync = REQ_FDATASYNC |
459 |
CODE: |
460 |
{ |
461 |
aio_req req; |
462 |
|
463 |
Newz (0, req, 1, aio_cb); |
464 |
|
465 |
if (!req) |
466 |
croak ("out of memory during aio_req allocation"); |
467 |
|
468 |
req->type = ix; |
469 |
req->fd = PerlIO_fileno (fh); |
470 |
req->callback = SvREFCNT_inc (callback); |
471 |
|
472 |
send_req (req); |
473 |
} |
474 |
|
475 |
void |
476 |
aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
477 |
InputStream fh |
478 |
UV offset |
479 |
IV length |
480 |
SV * data |
481 |
IV dataoffset |
482 |
SV * callback |
483 |
PROTOTYPE: $$$$$;$ |
484 |
CODE: |
485 |
read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
486 |
|
487 |
void |
488 |
aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
489 |
OutputStream fh |
490 |
UV offset |
491 |
IV length |
492 |
SV * data |
493 |
IV dataoffset |
494 |
SV * callback |
495 |
PROTOTYPE: $$$$$;$ |
496 |
CODE: |
497 |
read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
498 |
|
499 |
void |
500 |
aio_readahead(fh,offset,length,callback=&PL_sv_undef) |
501 |
InputStream fh |
502 |
UV offset |
503 |
IV length |
504 |
SV * callback |
505 |
PROTOTYPE: $$$;$ |
506 |
CODE: |
507 |
{ |
508 |
aio_req req; |
509 |
|
510 |
if (length < 0) |
511 |
croak ("length must not be negative"); |
512 |
|
513 |
Newz (0, req, 1, aio_cb); |
514 |
|
515 |
if (!req) |
516 |
croak ("out of memory during aio_req allocation"); |
517 |
|
518 |
req->type = REQ_READAHEAD; |
519 |
req->fd = PerlIO_fileno (fh); |
520 |
req->offset = offset; |
521 |
req->length = length; |
522 |
req->callback = SvREFCNT_inc (callback); |
523 |
|
524 |
send_req (req); |
525 |
} |
526 |
|
527 |
void |
528 |
aio_stat(fh_or_path,callback=&PL_sv_undef) |
529 |
SV * fh_or_path |
530 |
SV * callback |
531 |
ALIAS: |
532 |
aio_stat = REQ_STAT |
533 |
aio_lstat = REQ_LSTAT |
534 |
CODE: |
535 |
{ |
536 |
aio_req req; |
537 |
|
538 |
Newz (0, req, 1, aio_cb); |
539 |
|
540 |
if (!req) |
541 |
croak ("out of memory during aio_req allocation"); |
542 |
|
543 |
New (0, req->statdata, 1, Stat_t); |
544 |
|
545 |
if (!req->statdata) |
546 |
croak ("out of memory during aio_req->statdata allocation"); |
547 |
|
548 |
if (SvPOK (fh_or_path)) |
549 |
{ |
550 |
req->type = ix; |
551 |
req->data = newSVsv (fh_or_path); |
552 |
req->dataptr = SvPV_nolen (req->data); |
553 |
} |
554 |
else |
555 |
{ |
556 |
req->type = REQ_FSTAT; |
557 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
558 |
} |
559 |
|
560 |
req->callback = SvREFCNT_inc (callback); |
561 |
|
562 |
send_req (req); |
563 |
} |
564 |
|
565 |
void |
566 |
aio_unlink(pathname,callback=&PL_sv_undef) |
567 |
SV * pathname |
568 |
SV * callback |
569 |
CODE: |
570 |
{ |
571 |
aio_req req; |
572 |
|
573 |
Newz (0, req, 1, aio_cb); |
574 |
|
575 |
if (!req) |
576 |
croak ("out of memory during aio_req allocation"); |
577 |
|
578 |
req->type = REQ_UNLINK; |
579 |
req->data = newSVsv (pathname); |
580 |
req->dataptr = SvPV_nolen (req->data); |
581 |
req->callback = SvREFCNT_inc (callback); |
582 |
|
583 |
send_req (req); |
584 |
} |
585 |
|
586 |
void |
587 |
flush() |
588 |
PROTOTYPE: |
589 |
CODE: |
590 |
while (nreqs) |
591 |
{ |
592 |
poll_wait (); |
593 |
poll_cb (); |
594 |
} |
595 |
|
596 |
void |
597 |
poll() |
598 |
PROTOTYPE: |
599 |
CODE: |
600 |
if (nreqs) |
601 |
{ |
602 |
poll_wait (); |
603 |
poll_cb (); |
604 |
} |
605 |
|
606 |
int |
607 |
poll_fileno() |
608 |
PROTOTYPE: |
609 |
CODE: |
610 |
RETVAL = respipe [0]; |
611 |
OUTPUT: |
612 |
RETVAL |
613 |
|
614 |
int |
615 |
poll_cb(...) |
616 |
PROTOTYPE: |
617 |
CODE: |
618 |
RETVAL = poll_cb (); |
619 |
OUTPUT: |
620 |
RETVAL |
621 |
|
622 |
void |
623 |
poll_wait() |
624 |
PROTOTYPE: |
625 |
CODE: |
626 |
if (nreqs) |
627 |
poll_wait (); |
628 |
|
629 |
int |
630 |
nreqs() |
631 |
PROTOTYPE: |
632 |
CODE: |
633 |
RETVAL = nreqs; |
634 |
OUTPUT: |
635 |
RETVAL |
636 |
|